Remove HTTPRouteHTTPSListener unknown host test case

[sunjayBhatia]

What type of PR is this?

/kind bug
/kind test

/area conformance

What this PR does / why we need it:

While validating v1.1.0-rc1 with Contour, we are running into this test failing

The request to unknown-example.com never succeeds to get an HTTP response (the test expects a 404), since there is no Listener/certificate configured that will allow the gateway to terminate the TLS connection

See #3044

Which issue(s) this PR fixes:

Updates #3044 but does not close it

Does this PR introduce a user-facing change?:

NONE

[k8s-ci-robot]

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This pull-request has been approved by: sunjayBhatia

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[robscott]

Thanks @sunjayBhatia!

/lgtm

[sunjayBhatia]

well @robscott now I'm reading the test over again, this might be totally fine and just a deficiency of Contour since the same-namespace-with-https-listener Gateway does have a TLS Listener without a hostname configured (and with a generic enough certificate) so presumably an implementation should be expected to accept a connection on it

[sunjayBhatia]

I'm going to close this for now since I think this is probably correct actually, sorry for the confusion